It’s thought the gulls at Wern Las in Belgrano near Abergele are aggressively trying to protect chicks in the breeding season.

Squawks of protest are being made by customers but Royal Mail says staff safety is paramount.

Debbie Roberts, who works as a safety advisor, lives on the estate.

She said: “Last week, we noticed we hadn’t got any mail for what we thought was a week, but it’s hard to tell because you don’t always know if you’re due any mail.

“We put something on Facebook asking if anyone else had not had their post.

“One of my Facebook friends said a postman had refused to deliver because of the seagulls.

“Last year, somebody was scratched by a seagull. They’ve been known to swoop down in defence of their babies.

“A lot of residents have had no post from Royal Mail for days. I’m fuming.”

Some residents can collect their post from the Rhyl sorting office but some elderly people don’t have cars, she added.

The Royal Mail said its workers’ safety is paramount.

Spokeswoman Val Bodden said: “The postman delivering to addresses on the Wern Las estate in Belgrano, Abergele, has been experiencing swooping attacks by seagulls as he delivered mail on his round there over the past few weeks.

“We are aware that these kinds of attacks do occur at this time of year across the country as gulls are nesting.

“The safety of our people is paramount to Royal Mail and these swooping attacks have made it difficult for the postman to continue to do his job.

“We are taking the mail out daily and, where safe to do so, we are delivering mail to the residents.”

Royal Mail apologised to the customers affected and promised to continue to monitor the situation every day.

Ms Bodden added: “Customers are aware of the problem and we have advised them that they can collect their mail from the delivery office in Vale Road, Rhyl.”

Any customer concerned about their mail delivery can contact Royal Mail Customer Services on 03457 740740.

The Communications Workers Union, which represents postal staff, has also been approached for comment.